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Type  'No.  8. 

VARIOUS  TYPES  OF  EDISON  STANDARD  DYNAMOS— PLATE  I. 


VARIOUS  TYPES  OF  EDISON  STANDARD  DYNAMOS     PLATE  II. 


The  Edison  Co.  for  Isolated  Lighting, 


65    FIFTH    AVENUE, 


NEW  YORK  CITY. 


THE   EDISON   INCANDESCENT  ELECTRIC   LIGHT. 


The  Edison  Ligbl  is  the  most  perfect  medium  of  artificial  illumination  in  use.  Its  adaptability  is  universal,  and 
wherever  artificial  light  LB  required,  it  can  be  advantageously  used.  It  is  in  successful  operation  for  street  lighting,  and 
effects  a  better  and  cheaper  illumination  than  gas  or  the  arc  lamp.  Plants  varying  in  size  from  twenty-five  lamps  to 
fifteen  thousand  lamps  are  in  daily  use,  and  in  every  case  these  installations  are  constructed  electrically  and  mechanicallj 
in  accordance  with  the  methods  which  the  long  experience  of  our  Company  has  shown  to  be  the  most  suited  to  product 
the  best  results.  All  machinery  and  appliances  are  manufactured  by  the  various  Edison  shops  in  the  best  manner  possible, 
every  article  being  standardized  to  the  most  perfect  model.  Every  defect  incident  to  the  establishment  of  an  entirely  new 
industry,  whether  in  principle  of  structure  or  method  of  manufacture,  has  been  carefully  eliminated,  and  the  entire  equip- 
ment of  all  Edison  plants  now  represents  the  highest  degree  of  perfection  possible  to  obtain. 

The  Edison  shops  are  under  the  management  of  the  most  skilled  and  practical  electricians  and  electrical  engineers, 
who  have  been  associated  with  Mr.  Edison  from  the  time  of  his  early  experiments,  and  who  are  familiar  with  every  branch 
of  the  business,  having  aided  in  the  first  incandescent  electric  light  plant  ever  operated,  namely,  the  Menlo  Park  exhibit. 
The  enormous  product  of  Edison  light  equipment  which  has  been  turned  out,  and  is  now  in  operation  in  every  quarter  of 
the  globe,  has  resulted  in  the  acquirement  of  a  most  thorough  knowledge  of  the  best  processes  of  manufacturing,  and 
their  unequaled  facilities  restricts  the  cost  of  production  to  the  lowest  figure  consistent  with  the  high  standard  of 
excellence  which  is  always  maintained. 

1 


THE  EDISON  LIGHT. 

The  light  which  is  produced  by  an  Edison  lamp  at  the  rated  illuminating  intensity  is  perfectly  steady,  clear,  bright 
and  beautiful.  Not  the  slightest  variation  or  quiver  is  perceptible,  but  the  light  emitted  is  as  steady  as  sunlight  on  a 
cloudless  day. 


ISOLATED  PLANT  EQUIPMENT. 

Plants  for  lighting  separate  buildings  are  sold  outright  and  no  royalty  for  their  use  exacted.  The  various  sizes  at 
present  manufactured  are  as  follows  : 

25  Light,  16  Candle  Power  each.  150  Light,  16  Candle  Power  each.  300  Light,  16  Candle  Power  each. 

50      "  "        "  "  "  200      "         "        "  "  "  400      "  "       "  " 

75      "  "        "  "  "  250      "        "        "  "  "  500      "  "       "  "  " 

100      " 

The  standard  equipment  consists  of  a  dynamo  machine,  with  regulator  to  control  the  intensity  of  the  current,  an 
ampere  meter  to  measure  the  quantity  of  current  in  use,  an  indicator  to  show  the  pressure  of  the  current,  and  a  full  com- 
plement of  lamps  and  sockets.  This  does  not  provide  for  wire  and  the  various  appliances  connected  with  the  system  of 
distribution,  nor  for  fixtures,  as  the  conditions  existing  in  each  case  can  alone  determine  the  extent  and  character  of  the 
requirements. 


THE  EDISON   LAMP  CO.'S  FACTORY,   NKWAl 


EDISON  LAMP  PATENTS. 


No.  223,898,  Jan.  27,  1880. 
"  227,229,  May  4,  1880. 
"  230,255,  July  20,  1880. 
"  251,540,  Dec.  27,  1881. 
"  251,554,  Dec.  27,  1881. 
"  251,596,  Dec.  27,  1881. 


No.  264,698,  Sep.  18,  1882. 
"  264,737,  Sep.  19,  1882. 
"  265,311,  Oct.  3,  1882. 
"  265,777,  Oct.  10,  1882. 
"  266,447,  Oct.  24,  1882. 
"  317,631,  May  12,  1883. 


The  standard  Edison  lamp  is  rated  to  give  sixteen  candle  power  of  illumination.  Lamps  of  different  candle  power 
are  made,  all  of  which  will  burn  on  the  same  circuit.     The  sizes  now  made  are : 

10  Candle  Power.  20  Candle  Power.  50  Candle  Power. 

i3        "  "  24       "  "  100      " 

16        "  "  32        "  •  150      " 

The  ten-candle  power  lamp  ifl  extensively  used,  and  is  found  generally  to  give  a  more  effective  illumination  than 
the  ordinary  gas  burner.  By  reference  to  the  illustration  of  the  lamp,  it  will  be  seen  that  the  various  parts  are  fully 
covered  by  patents.  Despite  this,  there  are  some  companies  making  and  selling  the  Edison  lamp.  No  incandescent 
lamp,  different  from  the  Edison  lamp,  has  ever  been  in  commercial  use.  It  is  by  no  means  a  reasonable  assumption 
that  the  Edison  lamp  can  be  manufactured  by  any  one  better  than  by  the  manufacturers,  who  have  given  this  branch  of 
the  industry  their  unremitting  attention  from  its  inception.  The  only  difference  between  the  Edison  lamps,  as  manu- 
factured in  the  Edison  factory,  and  those  manufactured  elsewhere,  is  that  the  filament  in  the  lamp  made  by  the  Edison  Co. 
is  made  of  bamboo,  while  in  the  others  various  materials  are  used.  Hundreds  of  different  substances  were  carbonized  by 
Mr.  Edison  in  his  early  experiments ;  in  fact,  almost  every  known  substance  which  could  be  conveniently  submitted  to 
the  process,  and  in  no  case  were  such  satisfactory  results  secured  as  with  bamboo.  The  durability  of  the  lamp,  the 
amount  of  power  required  to  sustain  it,  and  its  liability  to  become  dimmed  by  use,  are  the  important  points  to  be  consid- 
ered in  judging  of  its  commercial  value.  No  lamp  has  ever  been  made  which  will  equal  those  manufactured  by  the 
Edison  Co.  in  these  respects.     These  lamps  are  made  with  reference  to  the  most  economic  results.     If  the  lamp  is  made 


so  as  to  require  less  power,  the  durability  of  the  lamp  is  sacrificed,  and  its  tendency  to  blacken  with  use  is  increased. 
The  most  extensive  experiments  prove  that  the  point  of  economy  is  eight  standard  lamps  to  the  horse-power,  and  at 
that  economy  they  will  last  longer,  and  the  tendency  to  blacken  be  less  than  at  any  other  point.  This  has  not  been 
shown  simply  in  the  laboratory,  but  is  the  verdict  of  the  users  of  over  500,000  lamps  doing  actual  lighting  service.  Noth- 
ing but  absolute  ignorance  of  the  subject  can  excuse  the  claim  that  better  results  are  secured,  for  no  opportunity  has  existed 
for  tests  to  be  made  in  comparison  with  the  unequaled  field  afforded  in  the  hundreds  of  thousands  of  Edison  lamps 
in  use.  If  any  real  improvement  on  the  Edison  lamp  is  ever  invented,  which  increases  its  efficiency  or  durability,  it  will 
be  of  more  value  to  those  who  have  a  right  to  apply  it  than  those  who  have  not.  Upwards  of  two  thousand  lamps 
per  day  are  manufactured  at  the  Edison  lamp  factory,  and  a  series  of  tests  and  experiments  unremittingly  conducted, 
with  a  view  of  improving  the  methods  of  manufacture  and   sustaining   the   standard  of  lamps  made. 


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THE  EDISON  MACHINE  WORKS,  NEW  YORK. 


THE   DYNAMO. 


The  efficiency  of  the  Edison  dynamo  is  ninety-six  per  cent.  That  is, 
this  percentage  of  the  power  delivered  at  the  dynamo  machine  is  con- 
verted into  electrical  energy.  No  higher  efficiency  is  obtained  by  any 
dynamo  machine  manufactured,  and  the  limit  of  possible  improvement 
can  be  said  to  have  been  attained  in  these  machines.  They  are  carefully 
constructed  of  the  best  obtainable  metal,  and  every  part  is  subjected  to  a 
thorough  test.  The  bearings  are  ample  in  dimensions,  thus  assuring  no 
trouble  with  heating;  all  electrical  connections  firmly  secured,  and  every 
part  made  and  fitted  in  such  manner  as  to  form  a  perfect  piece  of  mechan- 
ism in  every  detail.  The  depreciation  on  the  Edison  dynamo  machine  is 
practically  nothing.  The  commutator  and  brushes,  the  only  parts  subject 
to  wear,  will,  with  proper  care,  last  for  years.  The  machines  are  hand- 
somely finished  with  hard  wood  switch-boards,  mounted  with  polished 
nut al  connections.  The  regulator,  ampere  meter  and  indicator  are 
absolutely  accurate  in  recording  and  controlling  the  current,  as  to  quan- 
tity and  pressure,  and  are  tastefully  and  substantially  constructed 


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APPLIANCES. 


DOUBLE  POLE  SWITCHES. 


U.  S.  LETTKUS  PATENT, 
No.   839,298,   April   6th,   1886. 


The  "  Double  Pole  "  switch  is  so  arranged  as  to  break  both  poles  of  the 
eireuit  at  the  same  time.  The  importance  of  this  cannot  be  overestimated,  as 
it  is  the  only  method  of  positively  breaking  the  circuit.  If  only  one  pole  is 
broken,  crosses  or  leaks  are  apt  to  exist,  and  there  is  no  assurance  that  a  fire 
will  not  be  induced.  Safety  devices  and  circuit-controlling  devices,  which  act 
upon  both  poles  simultaneously,  are^bsolutely  essential  to  any  system  of  dis- 
tribution, and  no  method  can  be  secure  unless  so  constructed.  Switches  are  made 
of  all  sizes,  suitable  for  controlling  from  one  lamp  to  three  hundred  lamps. 


10 


DOUBLE   POLE   SAFETY   DEVICES. 


U.  S.  LETTERS  PATENT, 
No.  314,582,   March  31st,   1S85. 


The  object  of  the  safely  catch  is  to  prevent  undue  heating  of  the  conductors,  which  may  result  from  accident  or 
poor  contact,  and  which  would  in  most  cases  be  likely  to  produce  a  fire.  The  double  pole  cut-out  controls  this  absolutely, 
and  with  this  device  the  possibility  of  fire  cannot  exist.  Small  fusible  lead  wire  is  interposed  in  each  pole  through  the 
medium  of  a  ''plug  "  containing  properly  arranged  contact  points,  and  when,  from  any  reason,  the  temperature  of  the 
conductors  is  raised,  the  small  lead  wire  is  harmlessly  volatilized,  and  the  current  absolutely  shut  off. 

11 


FIXTURES. 


The  completeness  of  our  fixture  department  compares  most  favorably  with  the  most  extensive  manufactories  of  gas 
fixtures  in  the  country.  The  construction  and  design  of  the  fixtures  are  highly  artistic,  or  plain  and  substantial,  as  may  be 
required. 

The  production  of  fixtures  suitable  for  supporting  the  Edison  lamp,  meeting  at  once  the  artistic  and  electrical  con- 
ditions required  to  bring  the  system  into  general  use,  was  one  of  great  intricacy.  The  combination  of  gas  and  electric 
light  fixtures  in  one  structure  was  found  necessary,  and  the  devices  invented  to  meet  these  demands  are  numerous  and 
effective.  The  insertion  of  an  insulating  joint,  which  provides  for  the  flow  of  gas  into  the  pipes  of  the  fixture,  and  at  the 
same  time  electrically  insulates  the  structure  from  the  gas  pipes,  is  an  absolute  essential  to  such  a  combination. 

Numerous  other  devices  providing  for  the  wiring,  suspension,  insulation,  and  arrangement  of  fixtures,  were  invented 
and  patented,  all  contributing  to  the  perfection  of  the  Edison  system,  to  accomplish  which  required  inventions  at  every 
step.  The  unique  character  of  the  lamp  affords  scope  for  artistic  arrangement  impossible  with  any  other  means  of  light- 
ing, so  that  the  fixtures  are  more  varied  and  beautiful  in  design  than  are  gas  fixtures. 

The  following  electric  light  patents  are  owned  by  the  Edison  Co.: 


248.420    Elec.  Lamp  Fixtures Oct.     18, 

248,424    Elec.  Lamp  Fixtures Oct.    18, 

251,553    Elec.  Lamp  Fixtures Dec.   27, 

251,559    Extension  Fixture Dec.   27, 

266,701     Combination  Fixture April  18, 

259,235    Electrical  Fixture June     6, 

262,272    Extension  Chandelier Aug.    8, 

263,103    Electrical  Chandelier Aug.  22, 

263,137    Electrical  Chandelier Aug.  22, 

266.549  Electric  Fixture Oct.    24, 

266.550  Elec.  Light  Chandelier Oct.    24, 


1881 

275,749 

1881 

286,350 

1881 

293,553 

1881 

294,697 

1882 

297,269 

1882 

305,200 

1882 

307,879 

1882 

311,131 

1882 

337,199 

1882 

337,296 

1882 

337,336 

Connecting  Plug April  10.  1883 

Stand  Lamp Oct.      9,  1883 

Combination  Fixture Feb.    12,  1884 

Combination  Fixture Mch.    4,  1884 

Elec.  Light  Fixture April  22,  1884 

Reflector Sept  16.  1884 

Combination  Fixture Nov.  11,  1884 

Combination  Fixture  Jan.    20,  1885 

Extension  Chandelier March  2,  1886 

Elec.  Light  Fixture March  2,  1886 

Shade March  2.  1886 


12 


ECONOMY. 

The  economy  of  the  Edison  system  depends  so  much  upon  the  conditions  under  which  it  is  operated  that  no  definite 
standard  figures  as  to  cost  can  be  given.  We  have  testimonials  showing  that  the  cost  in  some  places  is  less  than  an  equiv- 
alent of  ten  cents  per  thousand  feet  for  gas,  and  in  some  cases  it  is  as  high  as  three  dollars  per  thousand.  The  items  of 
cost  in  running  a  plant  are,  first,  attendance;  second,  power,  oil  and  waste;  third,  renewal  lamps.  In  manufacturing 
places,  and  where  engineers  are  employed,  the  cost  of  attendance  can  be  left  out  entirely,  as  the  work  of  caring  for  a  plant 
is  trivial,  and  any  engineer  can  run  it.  The  cost  of  power  varies  according  to  conditions  under  which  it  is  produced.  The 
cost  of  lamps  is  eighty-five  cents  each,  and  as  they  are  guaranteed  600  hours,  the  cost  is  y85s5  of  one  cent  per  hour  per  lamp. 
The  expense  then  of  operating  an  Edison  plant  depends  entirely  upon  the  facilities  already  existing,  and  the  amount  of 
illumination  required.  It  is  a  safe  assumption  that  it  will  pay  to  put  in  the  Edison  light  wherever  the  cost  of  present  arti- 
ficial lighting  is,  say,  three  hundred  dollars  per  annum  and  over.  In  manufacturing  establishments  and  places  where 
steam  is  employed  particularly  is  this  so,  though  where  an  investment  in  boiler  andeugine  and  the  employment  of  special 
engineer  is  necessary,  the  lighting  requirements  should  be  greater,  in  order  to  economically  use  the  Edison  system. 


TESTIMONIALS. 

The  unqualified  praise  bestowed  by  the  users  of  the  Edison  light,  and  its  wide  adoption  for  all  classes  of  lighting,  is 
strong  evidence  in  support  of  all  claims  made  for  it.  We  append  a  few  of  the  very  many  testimonials  which  have  come  to 
us  unsolicited. 


ERBEN,    SEARCH    &    CO.,    WORSTED    MILLS,    PHILA- 
DELPHIA, PA. 

"  It  works  to  our  satisfaction,  and  Is  more  economical  than 
gas  under  any  aspect  that  it  can  be  viewed,  while  for  all-night 
work  the  saving  is  a  small  profit  in  our  manufacturing 
business. 

"  We  could  not  afford  to  be  without  it." 


PARKMOUNT    COTTON    AND   WOOLEN    MILL,  PHILA- 
DELPHIA, PA. 

"  The  guarantee  you  made  as  to  power  Is  more  than  borne 
out  in  practice." 


OKANGE  COUNTY  WOOLEN  MILLS,  NEWBURGH,  N.  Y. 

Mr.  James  Harrison  writes : 

"The  light  Is  better  and  cheaper  than  gas,  and  absolutely 


safe  as  to  fire.    I  expect  the  difference  in  insurance  rates  will 
pay  the  whole  expense  inside  of  two  years." 


CLARK  &  KEEN,  WORSTEDS,  PHILADELPHIA,  PA. 

"  Our  saving  from  use  of  electricity  on  the  Edison  system, 
over  our  gas  bills,  will  in  the  first  year  repay  the  cost  of  your 
whole  plant." 

"This  shows  an  average  life  of  our  lamps  at  this  estab* 
lishment  of  3,886. hours,  being  3,886  hours  In  excess  of  our 
guarantee."  

DA  VOL  COTTON  MILLS,  FALL  RIVER,  MASS. 

"A  careful  test  by  indicator,  made  September  6th,  with  818 
lamps  running  fully  up  to  candle  power  of  the  lamps  (16  C.  P.), 
gave  us  an  amount  of  power  used.  84.9  horse-power,  an  average 
of  9.12  lamps  per  horse-power." 

"  WC  are  fully  satisfied  as  to  cost,  quality  and  quantity 
of  light." 


14 


WAMSUTTA  COTTON  MILLS,  NEW    BEDFORD,  MASS. 

Edward  K 11  burn,  Agent,  writes: 

"  Charging  everything  to  this  light  that  I  can  charge,  I  believe 
It  to  be  more  economical  Mian  gas  at  one  dollar  per  thou- 
sand feet,  and  a  very  much  better  light." 


JOHN     B.    STETSON     &     CO.,    HAT    MANUFACTURERS, 
PHILADELPHIA,  PA. 

"  From  our  late  testa  we  find  It  to  cost  us,  as  near  as  we  can 
Calculate!  38  per  cent,  of  what  gas  would  cost  us  at  81.90 
per  1,000  feet."  

AVERY'S    AGRICULTURAL      IMPLEMENT    MANUFAC- 
TORY', PEORIA,  ILLS. 

"  We  know  Of  no  artificial  light  we  would  exchange  it 
for." 


THE  UNITED  STATES  ROLLING  STOCK  CO.,  CHICAGO, 
ILL.,  MACHINE   SHOPS. 

General  Master  Mechanic  writes: 

"  I  would  most   gladly   recommend    the   Edison    Electric 
Light  for  any  and  every  body's  use." 


CONGLOMERATE  MINING  CO.'S  MINE,  LAC  LA  BELLE, 
MICH. 

"The  Edison  Electric  Light  has  been  very  satisfactory  and 
economical.  The  cost  of  lighting  the  Mill  from  November,  1883,  to 
November,  1884,  was  £4,120.00  or  about  one-half  the  cost  of 
lighting  with  kerosene." 


MERRICK  THREAD  WORKS,  HOLYOKE,  MASS. 

"  We  put  the  system  in  our  smallest  mill  (4,000  spindles)  on 
trial,  and  after  six  months  we  estimate  that  in  one  year  the  sav- 
ing, as  compared  with  cost  of  illumination  by  gas,  would  be  suffi- 
cient to  pay  for  the  original  cost   of  plant  and  installment, 

and  leave  a  respect  able  margin  besides." 

Baaaoh  Ubnu 

FULTON    IRON    AND    ENGINE    WORKS,    DETROIT, 
MICH. 

•'  We  run  our  engine  to  drive  the  light  from  the  same  boiler 
that  is  used  to  furnish  steam  for  a  larger  foundry  engine  and  for 
heating,  and  we  do  not  notice  any  difference  in  the  fuel 
used." 


15 


WINONA  FLOUR   MILLS,  WINONA,  MINN. 

"  We  regard  it  as  perfectly  safe,  much  more  so  than  gas  or 
(dosed  lanterns,  for  It  is  simply  imposaltale  to  fire  a  building, 

or  cause  one  of  the  (much  to  be  dreaded)  explosions  that  flouring 
mills  are  liable  to  when  lights  are  carelessly  used." 


ANCHOR  MILLING  CO.'S  FLOUR  MILLS,  ST.  LOUIS,  MO. 

"  It  is  reliable,  cheap  and  safe,  and  we  would  not  go  back 
to  gas  light  for  any  consideration." 


BAY  STATE  SUGAR  KEFINERY,  BOSTON,  MASS. 

"We  take  pleasure  in  Btatlng  that  as  we  use  it,  it  is  not  only 
much  more  economical,  but  much  more  satisfactory  than 
gas." 


HARRISON,  HAVEMEYER    &    CO.,   SUGAR   REFINERY, 
PHILADELPHIA,  PA. 

"  We  find  an  economy  in  your  system  of  lighting,  compared 
with  the  use  of  gas  as  supplied  by  the  City  of  Philadelphia, 
amounting  to  about  33%,  1.  e.,  we  have  a  better  lighted  house 
than  when  using  gas,  at  hut  two-thirds  of  the  expense." 

"We  find  our  average  lamp  life  to  be  1,396  hours." 


BALTIMORE    TWINE    AND    NET    COMPANY,     BALTI- 
MORE, MD. 

t 
"  We  do  not  hesitate  to   say  that    it    costs   about  the  saun- 
as though  gas  were  furnished  at  60  cents  per  thousand." 


STEA1SNS  MFG.  CO.  MACHINE  SHOPS,  ERIE,  PA. 

"  We  have  saved  at  least  $100  per  month  during  the  winter 
season  by  its  086,  and  when  running  all  night  in  good  times  the 
saving  is  greater."  

THE    NATIONAL    MFG.    CO.,    THREAD    MILLS,  NASH- 
YILLE,  TENX. 

"1  believe  It  to  be  the  cheapest  light  for  practical  use 
known;  to  say  nothing  Of  its  superiority  as  an  illuminator,  its 
lack  of  heat  and  entire  safety  as  to  Are." 

"  Your  plant   replaced  the  Brush  Arc  system  with  US." 


CRACKER  BAKERY,  E.  .J.  LARRABEE  &  CO. 

N.  Y. 


ALBANY, 


"We  like  the  light  very  much,  and  it  Is  much  more  econom- 
ical than  gag;  it  burns  very  steadily,  no  dickering ;  i.->  decidedly 
more  convenient  and  much  safer  than  gas." 


16 


ARKANSAAV  OIL  CO.,  TKXAISK  AN  A,  KAS. 

"It  more  tlian  repays  its  cost  from  the  security  it  afTdnis 
against  Che  danger  of  Are." 

MWe  take  pleasure  In  contributing  our  testimonial  and  recom- 
mendation of  the  Edison  Incandescent  light  as  being,  in  oar  esti- 
mation, perfection  for  the  uses  and  purposes  Intended.'" 


INSTITUTION    FOB    THK    EDUCATION    OF   THE  DEAF 
AND  DUMB,  JACKSONVILLE,  ILL. 

"Our  electric  light  is  giving  us  as  Dearly  ported   satisfaction 
as  any  human  device  can." 


UNIVERSITY   OF   THE   STATE  OF  MISSOURI,  COLUM- 
BIA,   MO. 

"  So  well  pleased  are  we  that  we  mean  to  extend  ybur  system 
of  lighting  still  further,  to  the  weii  nigh  complete  exclusion  of  all 

other  modes  of  illumination  from  the  buildings." 


COLUMBIA  COLLEGE  LIBRARY,  NEW  YORK  CITY. 

MWe  always  recommended  the  Edison  light  very  Btrongly  to 
other  libraries  who  make  inquiries  as  to  the   best  system  to 

adopt.  " 


MISSOURI    INSTITUTION    FOR    THE    EDUCATION    OF 
THE  DEAF  AND  DUMB,  FULTON,  MO. 

"We  find  it  Far  superior  togas,  and  would  not  willingly  return 
to  our  old  system  of  lighting." 


MILLER  SCHOOL,  CROZET,  V  \. 

"It  costs  us  less  than  four-tenths  of  a    cent    for  one  slxteen- 
eandle  power  light  for  one  hour.' 


MILWAUKEE    ASYLUM    FOR   THE    INSANE,  WANWA- 
TOSA,  AVIS. 

"It  has  given  gOOd   satisfaction  all    the  time    and   we  cannot 
speak  too  highly  of  it." 


CENTRAL  STATION  PLANTS. 


The  problem  of  furnishing  electric  light  to  small  consumers  by  distributing  from  a  central  source  of  supply  was,  at 
the  time  Mr.  Edison  asserted  he  could  accomplish  it,  looked  upon  as  a  chimerical  dream.  The  most  positive  and  em- 
phatic refutation  of  Mr.  Edison's  assertions  were  made  by  scientists,  and  even  after  the  first  lighting  district  in  New  York 
City  was  started  and  in  operation,  public  assertions  were  made  through  the  press  that  the  whole  scheme  was  a  failure: 
that  half  the  current  generated  was  lost  by  leakage;  that  the  effect  to  carry  the  current  underground  was  utterly  imprac- 
ticable, &c,  &C.,  all  of  which  proved  that  the  critics  knew  absolutely  nothing  of  the  subject.  The  Edison  Co.  now  have 
stations  in  the  following  cities  and  towns,  and  are  supplying  electric  light  in  private  residences,  stores,  theatres,  hotels, 
streets,  and  to  all  who  want  it,  at  prices  much  lower  than  gas  was  furnished  prior  to  starting  the  Edison  stations. 


11) 


EDISON  CENTRAL  STATION  ILLUMINATING  COMPANIES  IN  THE  UNITED  STATES. 


Name  of  City  or  Town. 


New  York 

Lawrence 

Brockton 

Sliamokin 

Sunbury 

Fall  River 

New  burgh 

Tiffin..... 

Hazleton 

Williamsport... 
Mount  Carmel. 
Middletown  .... 

Piqua 

Bellefonte 

Circleville 

Appleton 

Cumberland  .... 

Ashland 

Des  Moines 

Harrisburg 

Lockport 

York 


State. 


New  York 

Massachussetts. 

a 

Pennsylvania.... 


Massachusetts. 

New  York 

Ohio 

Pennsylvania.... 


Ohio. 


Carried  forward. 


Pennsylvania , 

Ohio.." 

Wisconsin 

Maryland 

Pennsylvania. 

Iowa 

Pennsylvania. 
New  York. ... 
Pennsylvania. 


No.  of  Lamps. 


13,000 
4,000 
3,200 
4,000 
3,500 
4,000 
4,000 
•2,000 
3.075 
5.000 

800 
1,750 
1,800 
1,600 
2,700 
1,000 
2,200 
3,200 
3.200 
6,300 

700 
1,600 


7:!. (125 


Name  of  City  or  Town. 


Brought  forward. 

West  Chester 

Tamaqua 

McKeesport 

New  Brunswick 

New  Bedford 

Johnstown 

Wilmington 

Reading 

Chester 

Lebanon 

Jackson 

Erie 

Boston 

Detroit 

Atlantic  City 

Topeka 

Amsterdam 

Wayne 

Laramie  City 

Rochester 

Lancaster 

Little  Falls 


State. 


Pennsylvania. 


New  Jersey.  ... 

Massachusetts. 
Pennsylvania.. 

Delaware 

Pennsylvania.. 


Total  Lamps. 


Michigan 

Pennsylvania. . 
Massachusetts. 

Michigan 

New  Jersey. ... 

Kansas 

New  York.  .  .. 
Pennsylvania.. 

Wyoming 

New  York 

Pennsylvania.. 
New  York 


No.  of  Lamps. 


73,635 

1.900 
1,700 
1,900 
1,600 

1.600 
1,200 
1.200 
1,600 
1,000 
1,400 
1,600 
1,000 
2,: '.00 
10,000 

1,800 

4,800 

1,600 

BOO 

3,200 
6.000 

6.000 
1.200 

130,225 


20 


EDISON  MUNICIPAL,  SYSTEM. 

The  Edison  municipal  system  is  intended  strictly  for  street  lighting.  Dynamos  of  two  sizes  only  are  now  made. 
namely,  for  160  lamps  of  Hi-candle  power,  and  for  40  lamps  of  10-candle  power.  Municipal  lamps  of  24,  32  and  50-candIe 
power  are  made  and  can  lie  used  on  the  same  circuit.  For  general  city  lighting,  this  system  is  by  far  the  best  and  most 
economical  method,  and  wherever  it  is  in  use  the  most  satisfactory  results  arc  obtained.  The  cost  of  wire  in  this  system  is 
inconsiderable,  and  a  plant  of  1G0  16-candle  power  lamps,  sufficient  to  light  an  ordinary  town,  can  be  equipped  without 
power  with  but  a  small  investment  of  capital.  Smaller  machines  will  be  shortly  manufactured,  so  that  public  lighting 
on  the  smallest  scale  will  lie  practicable  and  profitable. 


ESTIMATES  OF  COST. 

In  sending  for  estimates,  please  furnish  the  following  information: 
How  much  boiler  power,  if  any.  is  available  to  run  dynamo? 
How  much  power  in  engine,  if  any.  is  available  to  run  dynamo? 

How  many  buildings  are  required  to  be  lighted,  how  many   lamps  in  each  building,  and  what  are  the  relative  posi- 
tions of  buildings  with  respeel  to  intended  location  of  dynamo? 
Are  any  special  fixtures  required  other  than  plain  pendants? 

21 


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MENLO  PARK"— THE  BIRTHPLACE  OF  THE  INCANDESCENT  LIGHT. 


